Key Hunters: The Mysterious Moonstone by Eric Luper
Getting lost in a good book has never been this dangerous!
Cleo and Evan have a secret. A collection of books so dangerous they are locked up tight. A friend has vanished inside the pages of one of them. It's up to them to find the key that will set her free.
A PRICELESS DIAMOND . . . STOLEN!
When Cleo and Evan go undercover to help a rookie detective interview a mansion full of suspects, nothing is as it seems. They must catch the crook - and find the right key - or they could be trapped inside this mystery forever . . .
Agents Cleo and Evan have been given an impossible mission: become super-spies and foil the plans of an evil mastermind. But it won't be easy to break into the Viper's secret underwater lair, complete a daring rescue, find the right key, and get out alive!!
On a dark and stormy night, Cleo and Evan are haunted by a disaster. Evan has been bitten by a werewolf! If they can't find the cure -- and the right key -- before the full moon rises, he'll be stuck prowling the pages of this ghost story for good!
Cleo and Evan's quest is clear. To save the kingdom, they must battle clever elves, horrible trolls, and the mighty Golden Dragon. Magic will help them win the war - and find the right key. But it will take more than swords and spells to survive this epic fantasy!
When Cleo and Evan set sail on the Titanic, time is not on their side! The famous ocean liner is destined to hit an iceberg. If they can stop a thief from stealing a priceless jeweled book--and find their next key--they might avoid sinking with the ship in this historic disaster!
A plane crash in the Amazon lands Cleo and Evan on the hunt for a valuable golden statue. They must find it -- and their next key -- to make it home alive. But the jungle is full of deadly creatures, raging rapids, and an all-too-familiar villain who wants nothing more than to trap them forever!
A super-smart, super-evil computer network has taken over the world. And Cleo and Evan are the only ones who can take it down. But the network has sent robots, drones, and cyborgs to stop them. If they can find a way to pull the plug -- and find their next key -- Cleo and Evan just might survive this science fiction showdown!